PF: I don't have an opinion one way or the other.
Flop: I'd have np w/ a bet here, but I probably don't bet either, since it's drawy and you're against calling stations.
Turn: I don't bet here, cuz I figure it's a great time for CSs use any decent spade as a excuse to call. You have to take this down 40% of the time to break even which I'm not sure that you do vs these two.
River: He's passive, but will he raise two pair versus 3 spades + 1 card to a straight on the board? I'd think not unless I saw evidence otherwise.